Otto zeh



UNITED STATES PATENT OFFICE.

OTTO ZEH, OF EISFELD, GERMANY.

PROCESS OF COLORING DOLL-HEADS.

SPECIFICATION forming part of Letters Patent N 0. 603,216, dated April 26, 1898. Application filed September 30, 1896. Serial No. 607,479. (No specimens.)

T0 or whom it may concern:

Be it known that I, OTTO-ZEH, of Eisfeld, in the German Empire, have invented new and useful Improvements in Processes of Coloring Doll-Heads, of which the following is'a specification.

By means of this process it is possible to impart the effect of burnt-in color or stain to ordinary burnt White. porcelain without using to this end any of the known methods for burning in the color. This is effected by applying certain colors to the porcelain and then coating the colored porcelain with a transp'arent lac. The color used to this end is a water-color, to which is added a little glue and glycerin. The porcelain is then stained with the color in question. This is best done by dipping the former into thelatter, which produces a very thin coat of. color upon the porcelain, .so essential for the method in question, as opposed to' the methods usually employed for painting of similar materials. After the porcelain has received this treatment it should again be dipped into highly-durable ground lac, which soaks into the coat of color, owing to the extreme weakness of the latter,

' and combines with it permanently on the suratthe same time of the lac soaking through,

while the glycerin prevents the coat of color becoming brittle and being knocked ofi.

After the groundlac has been thoroughly dried upon the coat of paint the material is treated once more with a thin coat of nonsoluble dull lac, which can also be substituted by wax. When dry, the porcelain has the appearance of having been treated with burnt colors-2'. e., as if it had been paintedwhile the coating possesses the great advantage that it throws up the coloring in extraordinary purity and is not effected by moisture, as it cannot be dissolved, owing to the presence of the lac.

The porcelain used for the above-described process shall not be porous, and held to the tongue it should not suck. It may be unglazed or glazed. The unglazed porcelain should be burned to such a manner that it can notbe slitted by means of a knife. In no wise a sinking of color or lac into the porcelain takes place.

Having now described my invention, what I claim, and desire to secure by Letters Patent, is-

The method of creating the efiect of burnt colors upon burnt white porcelain which consists in first applying to the saidporcelain a thin coating of a water-color containing glue and glycerin; second, in applying to this coating of water-color a thin coating of transparent lac which sinks into and becomes a part of the said initial coating; third in allowing the before-mentioned coating to dry and subsequently applying to the same a thin coating of 'dull lac for the purpose of producing a dull instead of a glossy effect, substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

OTTO ZEH.

Witnesses ADOLPH ZEH, ALVIN FLORSOHUTZ. 

